Internal-combustion-engine piston



April 7, 1931. H. M. JENNINGS I INTERNAL COMBUSTION ENGINE PISTON Filed May 6, 1930 wry/amp Patented Apr. 7, 1931 NEED] STATES PATENT ounce HENRY M. JENNINGS, or HILLSBORO, Texas INTERNALcoMBUsTm nNeINn PISTON Application filed May 6, Serial No. 450,234. There is a tendency of internal combus- Figure 4 is alfragmentary sectionalivicw tion engines to pump oil. This is ob ectionon thejhne 4--l of igure 2, showing: the

able because it results in fouling of the spark outlet from the chamber closed and the plugs and consequent inisfiring of the enoutlet from thepin opening in register with g I glne, carbonizing of the valves and engine the oilpassage formed in the pin.

resulting in knocking, loss of power and ira Figure is a View similar to Eigure 4, regular running, and a waste of the 011. showing the outlet ironi the pin opening Therefore, it is the primary object of closed andthe oil passage of thepinregisterthis invention to prevent the oil passing ingwviththe o-utletof the chamber,

0 around the pistoninto the working chamber Corresponding and like parts are referred of thevcylinder and, at the same time, admit to in the following description and: desigof proper lubrication of the piston and cylnated in the several views of the drawings inder without waste of the lubricant. bylike reference characters. ,v

I In accordance with the invention, the pis- The piston illustrated is of COIWentiOnaI 15 ton is provided with two interior chambers construction and; comprises ahead 1 and adjacent the head and in spaced relation to body Quin which is formeditheusual grooves provide clearance for the connecting rod. .for reception ofthe accustomed resilient Channels in the outer surface of the piston packing rings. Twochambers 3 are formed collect the surplus oil and direct it into the within the piston adjacent the head land I 29 said chambers. An outlet from each of the are transversely spaced, as indicated most chambers connects with the opening in which clearly in Figure 2 of the; drawings,uto prothe connecting rod pin is fitted and this vide clearance forthe connecting rod 4. opening has an outlet for the escape of the The numeral 1 5 designates the pin which oil to return to the source of supply for reforms connecting means between the piston #5 distribution. The connecting IOCl pin is and connecting rpdi This pin; is refe'r- 76 formed with a transverse opening for each ably solid and has an opening 6 o'rmed of the chambers for alternate registration transversely therein adjacent each end to g with the outlet thereof and the outlet of provide an il passagei The pin 5; fits the pin receiving opening. snugly in an opening 7 formedtin bosses 39 While the drawings illustrate a preferred 8 extending inwardly from opposite sides embodiment of the invention, it is to be of the body 2 and forming a; partithereof. understood that in adapting the means to The openings 7have bushings fitted therem e spe i i n e n eq i e t the in in a manner welli understood. An design m y be v ri nd h g 1n the outlet 9 is formed in the bottom of as minor details of construction may be reh f th h b 3 d: t ds s5 and the merits thereof, reference is to be sorted to within the scope of the invention into e in Opening 7 A i nlgxis as claimed without departing from the spirit formed in the bottom portion thibo thereof f h 8 in which the pin5 is mountedand con- For a full understanding 0 t e lnventlon mats with the pin Opening 73 andiconsfltil 9 tutes an outlet for the discharge ofthe oil h l t the followin descri tion and the i a dfieiwiiigs hereto atta hed, in iivhichz o e P g T i i 9 Figure 1 is a central lon itudinal secare out of 1 i pmvintmg tional view of a piston illustrative of an Passage 6 cemmllmcetlng therewlth the embodiment of the invention same time. As shown in Figure 4 of the Figure 2 is asimilar sectionalview on the T li g Pa -S ge 6 s d #9 line 22 of Figure 1, looking to the left, PGIlmg Ul l COI1I lCtS with the opening as indicated by the arrows. l0 and, as ndicated 1n Flgure 5, the passage Figure 3 is a horizontal sectional View on 6 connects with the opening 9 and is closed 59 the line 3-3 of Figure 2, to the op ening This prevents any loss between adjacent packing grooves adjacent,

the head of the piston. The channels 11 may be formed in any manner and usually consist of shallow cuts which are sufficiently deep at a middle point to connect with the chambers 3, as indicated. at 12.

A piston constructed 1n accordance with the inventlon removes surplus oil from the sides of the cylinder and leaves a film tor with the outlets of the oil chambers and having outlets, and a pin snugly fitted 1n the pin opening and provided with. transverse oil passages adapted to' alternately register with the outlets of the oilchambers and the outlets of the said pin openlngs.

In testimony whereof I afiix my si nature. HENRY M. J ENNINGS; E

proper lubricatlon. The surplus oil removed from the sides of the cylinder enters the channels 11 and passes into the chambers 3 through the openings 12. As the piston reciprocates, the connecting rod 4 oscillates and in one position, as indicated in Figure 5 of the drawings, the passage 6 connects with the outlet 9 and receivesoil from the chamber 3, and inanother position, as indicated in Figure4, the passage 6 registers with the opening 10 and admits of the oil discharging through said opening 10 to return to the oil pan or other source for redistribution in the continued operation of the engine. It

is observed that any pressure from the working chamber ofthe cylinder finding its way intothe chambers 3,is prevented from di 'rect escape because of the disposition of the openings 6, 9, and 10 which are prevented from registering at the same time.

The floor of the chambers 3 slopes toward the outlets 9 to prevent an accumulation of pin is surrounded by a film of oil which obviateswear and noise.

What is-claimed is: I

I. A piston ofthe character specified provided with inner oil chambers adjacent the head and in spacedrel'ation, and having surface oil" collecting channels opening into the oilch'ambers, the latter having outlets, said oil and insure a quick drainage. "The piston 7 piston having theopeningfor the connect- 7 ing rod pin provided with outlets and'conneoting with'thefloutlets from the oil chambers', and the connecting rod pin snugly fitting in the said opening andhaving transverse passages adapted to alternately register withthe respective outlets from the oil. chambers and pin opening.

'2. A-piston oi the character SPGClfiGClPI'O- vided adjacent its head Jwith packing grooves and having inner'oil chambers adacent the head lnspaced relation, andhav- 111g 01]. collecting channels'formed in that part ofthe piston disposed between adjacent packing grooves, each of the oil chambers having an outlet, thevopening for the con necting'rod pin being in communication 

